Easy Alternate State and Set Analysis?

[#1]

I have a expression in a textbox which works very well with an Alternate State of [AllTheatres]
=avg(aggr(count(ProcedureCount), Weekstart))

Moving over to Set Analysis, I had expected to be able to limit the set to the Alternate State but a text box with a expression of:

=

avg( {[AllTheatres]} aggr(count(ProcedureCount), Weekstart

))

Gives completely 

differenent results

Any ideas?

Regards,

Stewart

[giakoum · Accepted solution]

you applied state only on the avg

apply it on count as well

[#3]

Genius!!